Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, many people assume that the bicycle was invented in the 19th century, and that's partly true. However, the first two-wheeled vehicle, called a 'draisine', appeared in 1817 in Germany. It had no pedals; riders pushed their feet against the ground. Later, in the 1860s, pedals were added to the front wheel in France, creating the 'velocipede'. But it wasn't until the 1880s that the chain drive and pneumatic tires were introduced, making bicycles much safer and more comfortable. This led to a cycling boom in the 1890s, especially among women, as it offered them new freedom of movement.
❓ 강의에 따르면, 1880년대에 자전거를 더 안전하고 편안하게 만든 주요 변화는 무엇이었나요?
A. A: 앞바퀴에 페달을 추가하는 것
B. B: 체인 드라이브와 공기 타이어의 도입
C. C: 독일에서의 드라이지네 발명
D. D: 더 가벼운 소재를 프레임에 사용하는 것
✅ 正确答案
B: The introduction of the chain drive and pneumatic tires